Loudspeaker



FIG. 1 is a perspective view of a loudspeaker showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image; and,

FIG. 5 is a top plan view thereof.

The broken line showings of the letters, geometric shapes and feet form no part of the claimed design. 

The ornamental design for a loudspeaker, as shown and described. 